Re: Did I get a sloppy crown prep?

From: Bill (dentaldoc_at_hotmail.com)
Date: 01/02/05 

Date: 1 Jan 2005 20:57:32 -0800

I generally can't see much light through an elastomeric impression --
except for those areas to the sides of the actual tooth impression
itself. In the "closed-bite" impression technique, it's normal for the
teeth adjacent to the prepared tooth to be in full occlusion, thus
creating very thin spots in the impression where the upper and lower
(unprepared) teeth meet each other. These "contacts" would then be
quite transparent.

I don't want to see light through the area of the prep itself, as that
might indicate the need to increase the clearance between the prep and
the opposing tooth.

- dentaldoc

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